Question

an 18 V battery.
Two resistors, X and Y, are connected in series.
X has a resistance of 3 Ω.
There is a current of 2 A in X.

Calculate the p.d. across X.
______________________________________________________________
______________________________________________________________
P.d. across X = ______________________ V
(2)
(ii) Calculate the p.d. across Y.
______________________________________________________________
______________________________________________________________
______________________________________________________________
P.d. across Y = ______________________ V

Answer 1

Answer:

As the resistance are connected in series,

$v = ir1 + ir2 \\ 18 = 2 \times 3 + 2 \times y \\ 18 = 6 + 2y \\ 12 = 2y \\ y = 6 \: ohm$

P.d. across X = 2*3 = 6 V

P.d. across Y = 2*6 = 12 V